Stability analysis of the wake control problem

摘要

This study focuses on the stability analysis and lowdimensional modeling of the wake control problem.the influence of diverse symmetric and unsymmetric steady boundary conditions (blowing and suction) and the locatioon of two additona lcontrol cylinders on the critical Reynolds number for a circular cylinder flow is nuerically investigated with a 2D FEM code.The eigenfunctions of the linearized disturbance equation and Karhunen-loeve (snapshot POD) modes of hte numerical solution for the unsteady navier-Stodes equations are used to obtain the low-dimensional dynamical systems.Using just a few of the eigenmodes yields the reconstruction of the unsteady behavior of the complex wake flow.